Coil casing and switch therefor



W. HEMINGWAY, JR

COLL CASING AND SWITCH THEREFOR May s, 192s.

Filed March l, 1923 2 Sheets-Sheet 1 n V f May 8. 1928.

W. HEMINGWAY, JR

COIL CASING AND SWITCH THEHEFOR Filed March l, 1925 2 Sheets-Sheet 2 WHemL'ngway Patented May 8, 1928.

UNITED STATES PATENT OFFICE.

WILSON HEMINGWAY, JR., 0F VICKSBURG, MISSISSIPPI, ASSIGNOR T0 THE ELECTRO- LOCK MANUFACTURING COMPANY, OF VICKSBURG, MISSISSIPPI, A. CDRIPORATION OF MISSISSIPPI.

COIL CASING- AND SWITCH THEREFOR.

Application led Iarch 1, 1923. Serial No.`622,205.

rThis invention relates to systems of electrical distribution, now used on automobiles, motor boats and the like, and is an improvenient or continuation in part of the broad conception and subject matter disclosed by me in copending application filed December 20th, 1922, and bearing Serial Numbei 608,055.

The principal object of the present invention is to provide efiicient means for .preif'enting unauthorized use or removal of the coils and other parts of the. transformer assembly, commonly embodied in systems of the above mentioned type. l n

A more specific object of the invention is to utilize a controlling switch of the type disclosed inv said copending applications, 1n combination with a coil box or casing, to render the transformer assembly inacces sible when the switch is in locke position, thereby effectively guardin said assembly against theft, unauthorize use and mischievous tampering.

,Other purposes and advantages of the 1 nvention, not specifically stated above, will become apparent from the following detailed description and accompanying drawings wherein I- have disclosed what I now consider to be the preferred embodiment of the invention.

In the drawings:

Figure 1 is a vertical, sectional view of a coil box and switch constructed in accordance with my invention.

Figure 2 is a horizontal sectional view on the line 2 2 of Figure 3, illustrating the arrangement of contacts cairied by the movable parts of the switch.

Figure 3 is a. view partly in elevation and partly in vertical section of the coil box and associated switch.

Figure 4 is a sectional view on line 4-4 of Figure 3, illustrating the arrangement of contacts carried by the stationary part of the switch, the movable contacts being designated by dottedl lines as they will appear in the closed position of the switch and the central portion of the view be ing broken away to expose interior lock structure.

Figures 5 and 6 are views similar tol Figure 4, illustrating by dotted lines the different positions to which the movable contacts are shifted in the use of the switch.

Figure 7 is a diagrammatic view illustrating the manner in which the switch and associated parts of the transformer assembly are embodied in a complete system.

Referring more particularly to the drawings, 5 designates a tubular casing open at one end and provided at an intermediate point with an internal annular shoulder 6. This casing is used to inclose a transformer assembly comprising an induction coil 7 a resistance 8 connected in series with the primary winding of the coil and a condenser 9 having shunt connection with said winding. Preferably the induction coil 7 is fastened by a' screw 10 to the closed end of the casing with the primar and secondary windings of the coil secure to the low and high tension terminals l1 and 12.

In order to prevent removal, tampering with, or unauthorized use of the said transformer assembly, I provide a suitable switch structure adapted to be secured in the open end of the casing 5 to provide a closure therefor which cannot be removed in the locked position of the switch except by breakage. The switch structure which I use in this connection is, with the exception of a few changes, substantially the same as that disclosed in my copending application Serial Number 608,055, filed December 20th, 1922, and therefore in describing such structure, detailed reference will be had only to such parts thereof as are necessary to the purposes of the present invention.

As herein disclosed, the said switch structure comprises a base 13 formed of insulating material and of a size to be snugly receivcd within the open end of the casing 5. This base is equipped with a central sleeve or bushing 14, the inner end of which is formed with an integral flange 15 having a circumference equal to that of the base and being adapted to rest against the seat 6 to which it is secured by suitable screw bolts 10. The heads of the bolts 16 are concealed between the flange l5 and the base 13, the inner surface of the latter bein preferably cut away to provide recesses 1 accommodating the heads therein.

An annular wall or shell 18 is suitably Vsecured to the outer circumferential-edge of` ment of the cover in either direction is pref- 23formed by cutting away a v. end of a lock recesses or Sockets 25 i' through the medium ofl a i 3ov erably limited by means of a projection 22 carried by the cover and operating in a slot pprtion of the ange 19 this,z construct1on eing clearly illustrated by dotted lines in Figure 2.

The cover 20 is also provided with a central opening in which is keyed the upper barrel 24. `'Ihe lower end of this barrel is rotatably mounted in the bushing or sleeve 14 and a locking mechanism inclosed within the barrel, preferably includes a bolt adapted .to be projected outwardly through suitable openings in sleeve 14 and selectively engaged with a pair of and 25 formed in the base 13 when the cover is rotated to predetermined positions. y

Numerals 26 and 27 indicate a pair of contact brushes electrically connected together bar 28 formed of a.l suitable conducting material. This bar is secured to the inner side of the cover by suitable screws 29 as shown to advantage in Figure 2. The cover also carries a pair of contact lingers 30 and 31 secured together at their upper ends and to the cover through the medium of a screw 32. A further contact finger 33 is fastened to the conducting bar 28 intermediate the main contacts 26 i' and 27. The base 13 of the switch is equipped `with a plurality of contacts designated respectively 34, 35, 36, 37, and 38, the contact 36 being connected through the resist-ance 8 to the primary winding of the induction-coil 7 as shown to advantage in Figure 1. y

In ractice, the switch and transformer assem ly carried by the casing 5 are incorporated in a system of distribution as shown v Y to advantage in Figure .7.

As shown in this figure, the main contactl 34 of the switch base 13 1s connected by a lead 39 to one terminal of the batter 40,

the remaining terminal of the battery eing connected to the ground. The opposite ccntact 35 of the switch base is connected through the starter switch 41 to the starter 42. The stationary contact 38 of the switch base is connected by suitable leads to the ammeter 43 and to the movable elements of the light switch 44'and ignition switch 45, the stationary contact of the latter switch being connected by a return lead 46 to the stationary contact 37 of the switch base. In the closed positionof my improved switch, as represented in Figure 4, the main -cover contacts 26 vand 27 are engaged with the with the base switch to the Contact 37 through the contact i fingers 30 and 31 to the contact 36 and from the latter to the primary winding of the induction coil 7. As represented diagrammatically, thelow tension terminal 11 of the coil is connected to an interrupter 47 whiley i the high tension terminal 12 is connected to the distributor 48. In this position ofthe main controlling switch, it is evident that current may be supplied at will to the starting, lighting and ignition circuits by closing the switches 41, 44 and 45. nVVhenit is desired to shut oli' the flow of current to the starter and ignition circuits without interfering with the lighting circuits, the movable contacts of the main controlling switch are shifted to the first oft position represented by Figure 5. As shown in this figure, the movable contact 27 `has passed out of engagement with the stationary base contact -35 but the movable contact 26 is still permitted to remain in engagement with the base contact 34, due to the fact that the last -mentioned contact is made somewhat longer than the contact 35. In this position of -the parts, current from the battery flows through contact 34, connecting bar 28 and contact finger 33 to the contact 38 and from thence through the ammeter 43 to the movable contact of the lighting switch 44. No current, however, is furnished to the ignition switch due to the fact that the ignition circuit has been disrupted by separation of the contact fingers 30 and 31 from the contacts 36 and 37. The switch is locked in this position by projection of the bolt 25 through one of the openings of the sleeve 14 and into the socket 25 of the base.

When it is desired to cut off all iiow of current from the battery, the movable switch contacts are shifted'to the position shown in Figure 6 and in this position. it will be noted that the movable contacts 26 and 33 have been entirely disengaged with the sta-A tionary contacts 34 and 38 so that all circuits leading to the battery are disrupted. In this position theswitch is locked by projection of the bolt 25 into the socket 25,"ot' the base. f

In order to prevent unauthorized use ot the generator, designated by "the numeral 49, the insulated terminal thereof is connected through the ammeter 43 to the movable lUU . theft of the coils and to lock the barrel 24 and the cover 20vto contact of the ignition-switch 45. `It will thus be seen that, in the open position of my improved switch, no current from the generator is permitted to pass to the ignition and starting` equipment.

From the foregoing, it will be apparent that my invention affords simple and effective means for protecting the electrical equipment of an automobile, motor boat, or the like, against unauthorized use and the injurious effects of ounds orshort 'circuits such as frequent ydevelop'in the wiring. The\in\vention a so serves to prevent other parts of the inclosure of the ascannot be opened,

transformer assembly by sembly in a casing which in the locked position of the switch, except by completely destroying the same. With reference to this last statement it is pointed out that, in the locked position of the switch, the bolt 25, by reason of its projection through an opening of the sleeve 14, serves said sleeve and as the latter is anchored to the casing 5 by concealed fastening bolts 16 removal of the switch structure from the opening of the casing 5 is effectually vented. In the unlocked position of switch, the cover 20 and the base 13 be easil the may y removed to expose the screws 16 which may be then withdrawn to release the sleeve '14. In assembling the switch structure with casing 5 the cured in place by the screws 16 and the sections of the base element 13 then placed in position. Shell 18 may be fastened or held to the base 13 in any suitable manner it being understood that the cover 2O is secured to the iiange 19 by the retaining ring 21 prior to assembly of the' shell 18 with the base 13.

By inclosing the resistance 8 with the induction coil 7, I avoid the exposure of an terminals connected directlyto the coil whichY could be utilized byunauthorized persons for supplying current to the coil independently of the contacts carried by the switch box 13. The condenser is preferably made as a part of the coil and inclosed therewith to insure a uniform condenser circuit erfectly balanced with the coil on which 1t is to he used. In this way, the possibility of condensers being used with coils for which they are not particularly designed is .reduced to a minimum.

Having thus fully described what I now conceive to be the preferred embodiment of my invention, it is to be understood that I am not to be limited to the exact construction and assemblage of parts set forth, as various changes and modifications may be resorted to within the scope and spirit of the appendedclaims.

I claim:

1. A combined housing and control switch pre- Harige 15 is first se` for electrical apparatus comprising a metal casing formed with a'single opening for insertion and removal of vsaid apparatus, a switch inserted in said casing and including a rotary coverv closing said opening, and means for locking said cover in various circuit controlling positions including provision for securinr said cover and the other components of the switch structure against removal fromthe casing.

2. A housingifor electrical apparatus comprising a casing formed with a single opening for insertion and removal of said apparatus, said casing being formed with an interior annular. shoulder located inwardly of and facing toward said opening, a switch structure including a base portion seated against said shoulder and a rotary cover portion assembled with the base portion and made of a size to form a closure for' said opening and means for locking the cover and base portions of the switch together in a predetermined circuit controlling position including provision for securing the said locked-together portions of the switch directly to the casing to prevent removal of the Switch. i'

3. A housing for electrical apparatus comprising a casing formed with a single opening for insertion and removal of said apparatus, an inserted switch including a base portion having an element thereof anchored to the casing, a cover portion rotatably assembled with the base portion and arranged to close the opening in the casing and to conceal said base portion, said cover and base portions of the switch being provided with vcooperating circuit controlling contacts and means for locking the cover portion of the switch to the anchored element ofthe lbase portion when the cover portion is moved to a predetermined circuit controlling position.

4. A housing for electrical apparatus comprising a casing formed with a single opening for insertion and removal of said a payratus, an inserted switch arranged to orm a closure for portion having a centrally located metal sleeve fastened to a wall portion of the casing, a cover portion rotatably assembled with said base portion, a lock barrel having its outer end xed to the cover portionto rotate therewith and its in` ner end extending into said sleeve, said lock barrel enclosing a locking mechanism including a bolt adapted to be projected through an opening in the sleeve and into a socket formed in the base portion.

5. A housing for electrical apparatus comprising a casing formed with a single opening for insertion and removal of said apparatus, an inserted switch arranged to form a closure for said openin said switch comprising a base of insu ating 'material, a.

end keyed to the cover to rotate therewith and the other end extending into said sleeve, and a lock mechanism Within said barrel including a bolt adapted to be projected through an opening in the sleeve.

6. A housing for electrical apparatus comprising a casing formed with a single opening for insertion and removal of said apparatus, an Inserted switch mcludmg a base.

portion and a cover portion, the latter being rotatably mounted in the opening of the casing and arranged to forni aclosure forl said opening, said cover and base portions bemg provided p with cooperating circuit y Lacasse controlling contacts, and means for locking the cover in a predetermined circuit controlling position including provision for securing the cover to an interior wall portion of the casing whereby removal of the cover and other components of the switch structure is prevented.

7. A housing ior electrical apparatus comprising a casing formed with a single open ing for insertion and removal of said apparatus, a switch inserted in the casing and arranged to close said opening, said svvitch including a part fastened to an interior wall portion of the casing and a second part adapted to be locked to the first mentioned part in 'certain` predetermined position of the removable element of the switch and to thereby secure the complete switch structure against removal from the casing;

In testimony whereof I have atlix'ed my signature.

WILSON HEMINGWAY.. Jn.

vhereunto CERTIFICATE 0F CORRECTION.

Patent No. 1,669,334.

i crameeuay 8, i928; w

wlLsoN HEMINGWAY, ia.l

it is hereby certified that error appears in theprinted specification of the above numbered patent requiring correction as follows:v Page 4, line 40, claim 7, for' the word "removable" read- "movable' and that the said Letters Patent should he read with this correction therein that the same may conform to the record of the case in the Patent Office.

t signed and sealed this 19th day prima, A. 15.1928. f

(Seal) 'Mr J. Moore, ActingCommissoner of Patents. 

